Which level of Normalization does the below table satisfy?

ID FName Salary
100 Mehran $100
101 Kate $110
103 Riaz $90
100 Ming $100
109 Manpreet $110

Question

Which level of Normalization does the below table satisfy?

ID	FName	Salary
100	Mehran 	$100
101	Kate 	$110
103	Riaz 	$90
100	Ming 	$100
109	Manpreet 	$110

BlackTom AI · Accepted Answer

We start by restating the given problem: determining the normalization level of the provided table with columns ID, FName, Salary and rows showing repeated IDs such as 100 occurring for Mehran and Ming.

First, assess 1NF (First Normal Form): 1NF requires that all column values be atomic (no repeating groups) and each row be unique in terms of its primary key. In the table as shown, each row contains atomic values (ID, FName, Salary) and there are no cells with multiple values in a single field. However, the presence of the same ID value across multiple rows does not by itself violate 1NF; it simply means ID is not a unique identifier (candidate key) for the relation. Therefore, the table can still be in 1NF, provided there is some key that uniquely identifies each row (which is not shown).

Next, consider 2NF (Second Normal Form): 2NF requires 1NF plus every non-key attribute to be fully functionally dependent on the primary key (no partial dependency of non-key attributes on part of a candidate key). Since the candidate key is not specified (and ID is repeated), we cannot confirm any full functional dependencies. If we treated a combination of (ID, FName) as a composite key, then Salary depending only on ID would introduce a partial dependency, suggesting the table is not in 2NF. But because the actual key is not defined in the data provided, we cannot conclusively assign 2NF status without making assumptions.

Then, look at 3NF (Third Normal Form): 3NF requires 2NF plus no transitive dependencies, meaning non-key attributes should not depend on other non-key attributes. In this dataset, Salary appears to depend on ID (a key attribute) but there’s no information about dependencies between FName and Salary beyond what the rows show. Without a clearly defined and stable key and explicit functional dependencies, we cannot determine a 3NF status either.

Because the problem statement’s answer options are not provided (the answer list is empty), we cannot map these conclusions to a specific choice. The missing options prevent a definitive selection, and any assertion about the normalization level would depend on identifying the candidate key and the explicit dependencies, which are not specified here.

A few additional observations to guide understanding:
- The repeated ID values imply that ID alone may not be a unique key for the table as shown. If there were a composite primary key or an additional key attribute (not displayed) that uniquely identifies each row, the normal form assessment could proceed more clearly.
- If we were to enforce a unique row identifier (e.g., a surrogate key) and keep the three attributes as given, the question would then hinge on whether non-key attributes (FName, Salary) are functionally dependent on the key and whether any transitive dependencies exist.
- In summary, with the information provided and absent explicit candidate keys or functional dependency rules, we cannot definitively categorize the table into a specific normalization level (2NF or 3NF). The lack of answer options further prevents selecting a stated level.

BAIT_V 507 BA2 2025W1 Quiz 2- Requires Respondus LockDown Browser

Which level of Normalization does the below table satisfy? ID FName Salary 100 Mehran $100 101 Kate $110 103 Riaz $90 100 Ming $100 109 Manpreet $110

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